| Summary: | Neurocognitive measures have only scarcely been used in second language (L2) vocabulary research. Traditionally, L2 vocabulary knowledge has been gauged by using off-line measures that allow for conscious thinking and attentional control. Yet, it has been argued that more research is warranted on the role of measures that have the sensitivity to tap into on-line lexical processing. Recording Event-Related Potentials (ERPs) may be an effective technique in order to refine our understanding of L2 vocabulary knowledge. In the current article, we provide a comprehensive review of the relevant literature in order to examine the extent to which ERP research may be valuable to L2 vocabulary research. This review focuses on the potential of ERPs to address the multifaceted nature of vocabulary knowledge. It also examines the role of ERPs to elucidate the neurocognitive mechanisms underlying the incremental nature of L2 vocabulary learning. Finally, this paper discusses the extent to which ERPs might contribute to understanding factors that affect L2 vocabulary learning.
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